Leatherman 831064 Serac S3 LED Flashlight Lumens 100 (high), 43 (med), 7 (Low) Run time 1 hour (high), 4 hours (med), 36 hours (low) (Tested with CR123 lithium battery) Body made from 6061-T6 hard-anodized aluminum, bezel made from stainless steel Humidity resistant, corrosion resistant, shock resistant, power management circuitry for steady light output Battery type-CR123